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Pixelate areas on an image in C#

Posted by Rod Stephens at 1/28/2011 3:18 PM | Add Comment

Plot a simple heart-shaped function in C#

Posted by Rod Stephens at 1/21/2011 8:27 AM | Add Comment

Find Egyptian fractions in C#

Posted by Rod Stephens at 1/17/2011 6:53 AM | Add Comment

Make a Fraction class in C#

Posted by Rod Stephens at 1/16/2011 8:23 AM | Add Comment

Use a label setting algorithm to find shortest paths through a network in C#

Posted by Rod Stephens at 1/14/2011 4:38 PM | Add Comment

Draw a variety of fractal strange attractors in C#

Posted by Rod Stephens at 12/20/2010 10:32 AM | Add Comment

Use steganography to hide encrypted messages in an image in C#

Posted by Rod Stephens at 12/12/2010 6:28 AM | Add Comment

Make a Set class that inherits from HashSet and that support operators such as union and intersection in C#

Posted by Rod Stephens at 12/11/2010 6:06 AM | Add Comment

Use the HashSet class to represent sets and perform set operations in C#

Posted by Rod Stephens at 12/10/2010 4:04 PM | Add Comment

Find a least squares Weibull curve fit for a set of points in C#

Posted by Rod Stephens at 11/25/2010 6:38 AM | Add Comment

Find an exponential least squares fit for a set of points in C#

Posted by Rod Stephens at 11/24/2010 9:43 AM | Add Comment

Find a smallest enclosing rectangle for a polygon in C#

Posted by Rod Stephens at 11/17/2010 3:39 PM | View Comments (7) | Add Comment

Use branch and bound with an initial heuristic to solve the partitioning problem in C#

Posted by Rod Stephens at 11/13/2010 9:45 AM | Add Comment

Solve the partitioning problem by using an exhaustive search in C#

Posted by Rod Stephens at 11/13/2010 9:40 AM | Add Comment

Use branch and bound to solve the partitioning problem more quickly than an exhaustive search in C#

Posted by Rod Stephens at 11/11/2010 9:41 AM | Add Comment

Find a polynomial least squares fit for a set of points in C#

Posted by Rod Stephens at 11/8/2010 8:20 AM | Add Comment

Find a linear least squares fit for a set of points in C#

Posted by Rod Stephens at 11/6/2010 4:08 PM | Add Comment

Draw a vortex fractal with smoothly shaded colors in C#

Posted by Rod Stephens at 10/22/2010 9:10 AM | Add Comment

Draw a Mandelbrot set with smoothly shaded colors in C#

Posted by Rod Stephens at 10/21/2010 9:12 AM | Add Comment

Pick N random items from an array of M items in C#

Posted by Rod Stephens at 10/20/2010 8:36 AM | Add Comment

Select a random object from an array or other collection in C#

Posted by Rod Stephens at 10/19/2010 6:11 AM | Add Comment

See if a number is expressible as a sum of two cubes (and calculate Taxicab numbers) in C#

Posted by Rod Stephens at 10/18/2010 7:29 AM | Add Comment

Draw a vortex fractal in C#

Posted by Rod Stephens at 10/5/2010 5:59 AM | Add Comment

Draw a Phoenix set fractal in C#

Posted by Rod Stephens at 10/3/2010 6:54 AM | Add Comment

Use a Complex number class to draw Mandelbrot sets easily in C#

Posted by Rod Stephens at 10/2/2010 8:31 AM | Add Comment

Draw a Bézier curve "by hand" that matches the one drawn by the Graphics object's DrawBezier method in C#

Posted by Rod Stephens at 9/13/2010 8:46 PM | Add Comment

Improve the picture tiles jigsaw game in C#

Posted by Rod Stephens at 9/4/2010 7:25 AM | Add Comment

Make a picture tiles jigsaw game in C#

Posted by Rod Stephens at 9/2/2010 7:10 AM | Add Comment

Draw lines with arrowheads in C#

Posted by Rod Stephens at 9/1/2010 7:17 AM | View Comments (2) | Add Comment

Partition an area with circles and draw each region's count in C#

Posted by Rod Stephens at 8/27/2010 6:14 AM | View Comments (2) | Add Comment

Find a Region's centroid in C#

Posted by Rod Stephens at 8/24/2010 5:39 AM | Add Comment

Find the area where two or more circles overlap in C#

Posted by Rod Stephens at 8/23/2010 7:07 AM | View Comments (3) | Add Comment

Find the tangent lines between two circles in C#

Posted by Rod Stephens at 8/21/2010 7:03 AM | Add Comment

Find the tangent lines between a point and a circle in C#

Posted by Rod Stephens at 8/20/2010 9:17 AM | Add Comment

Use transformations to map points from one coordinate system to another when drawing in C#

Posted by Rod Stephens at 7/29/2010 12:13 PM | Add Comment

Use Newton's method to draw fractals for equations of the form F(z) = z^N + z^(N-1) + ... + z + 1 in C#

Posted by Rod Stephens at 7/24/2010 7:52 AM | Add Comment

Use Newton's method to draw fractals for equations of the form F(z) = z^C - C^z in C#

Posted by Rod Stephens at 7/23/2010 5:58 AM | Add Comment

Use Newton's method to draw a fractal in C#

Posted by Rod Stephens at 7/22/2010 6:08 AM | Add Comment

Use Newton's method to find the roots of equations in C#

Posted by Rod Stephens at 7/21/2010 5:30 AM | Add Comment

Solve a system of equations with Gaussian elimination in C#

Posted by Rod Stephens at 7/14/2010 6:52 AM | Add Comment

Scale a drawing so it fits a target area in C#

Posted by Rod Stephens at 6/27/2010 6:33 AM | Add Comment

Draw a colored butterfly curve in C#

Posted by Rod Stephens at 6/25/2010 6:10 AM | View Comments (3) | Add Comment

Draw an epitrochoid in C#

Posted by Rod Stephens at 6/24/2010 8:43 AM | Add Comment

Draw level curves for an array of z values corresponding to points (x, y) in C#

Posted by Rod Stephens at 5/3/2010 5:13 AM | Add Comment

Draw level curves for functions of two variables z = F(x, y) in C#

Posted by Rod Stephens at 5/2/2010 6:11 AM | Add Comment

Plot a heart-shaped function in C#

Posted by Rod Stephens at 5/1/2010 4:08 PM | Add Comment

Plot a smiley face function in C#

Posted by Rod Stephens at 4/30/2010 6:31 AM | Add Comment

Use delegates to pass a method's address to another method in C#

Posted by Rod Stephens at 4/29/2010 3:40 PM | Add Comment

Plot the equation of a function of two variables in C#

Posted by Rod Stephens at 4/28/2010 8:26 AM | Add Comment

Draw a skewed Sierpinski gasket with any number of corners in C#

Posted by Rod Stephens at 3/31/2010 6:33 AM | Add Comment

Draw a Sierpinski gasket in C#

Posted by Rod Stephens at 3/30/2010 6:08 AM | Add Comment

Determine where two circles intersect in C#

Posted by Rod Stephens at 3/29/2010 6:21 AM | View Comments (5) | Add Comment

Determine where a line intersects a circle in C#

Posted by Rod Stephens at 3/28/2010 6:25 AM | Add Comment

Find the shortest distance between two line segments in C#

Posted by Rod Stephens at 3/27/2010 8:31 AM | Add Comment

Find the shortest distance between a point and a line segment in C#

Posted by Rod Stephens at 3/26/2010 6:01 AM | Add Comment

Determine where the lines defined by two segments intersect in C#

Posted by Rod Stephens at 3/25/2010 6:09 AM | Add Comment

Draw a fractal Pickover strange attractor in C#

Posted by Rod Stephens at 3/19/2010 6:28 AM | Add Comment

Apply filters to images to perform edge detection, smoothing, embossing, and more in C#

Posted by Rod Stephens at 3/14/2010 7:39 AM | Add Comment

Draw a curlicue fractal in C#

Posted by Rod Stephens at 2/5/2010 7:45 AM | Add Comment

Draw a hypotrochoid (Spirograph curve) in C#

Posted by Rod Stephens at 1/18/2010 7:44 AM | Add Comment

Calculate the greatest common divisor (GCD) and least common multiple (LCM) of two integers in C#

Posted by Rod Stephens at 1/16/2010 2:52 PM | Add Comment

Generate all of the selections of K items from a set of N items in C#

Posted by Rod Stephens at 1/15/2010 7:04 AM | Add Comment

Calculate the binomial coefficient "N choose K" efficiently in C#

Posted by Rod Stephens at 1/14/2010 7:08 AM | Add Comment

Calculate factorials (and use Debug.Assert) in in C#

Posted by Rod Stephens at 1/13/2010 6:53 AM | Add Comment

Generate all of the permutations of a set of objects in C#

Posted by Rod Stephens at 1/12/2010 8:41 AM | View Comments (1) | Add Comment

Find a number's prime factors in C#

Posted by Rod Stephens at 1/6/2010 8:04 AM | View Comments (2) | Add Comment

Make a list of prime numbers in C#

Posted by Rod Stephens at 1/5/2010 6:53 AM | Add Comment

Triangulate a polygon in C#

Posted by Rod Stephens at 1/4/2010 7:41 AM | Add Comment

Reverse a polygon's orientation in C#

Posted by Rod Stephens at 1/4/2010 7:39 AM | Add Comment

Determine whether a polygon's points are oriented clockwise in C#

Posted by Rod Stephens at 1/4/2010 7:37 AM | View Comments (2) | Add Comment

Find a polygon's centroid in C#

Posted by Rod Stephens at 1/4/2010 7:35 AM | View Comments (5) | Add Comment

Calculate a polygon's area in C#

Posted by Rod Stephens at 1/4/2010 7:32 AM | Add Comment

Determine whether a point is inside a polygon in C#

Posted by Rod Stephens at 1/4/2010 7:30 AM | Add Comment

Determine whether a polygon is convex in C#

Posted by Rod Stephens at 1/4/2010 7:23 AM | Add Comment

Perform geometric operations on polygons in C#

Posted by Rod Stephens at 1/4/2010 7:16 AM | Add Comment

Draw a Sierpinski fractal curve in C#

Posted by Rod Stephens at 12/28/2009 7:15 AM | Add Comment

Draw a strange attractor fractal in C#

Posted by Rod Stephens at 12/26/2009 9:31 AM | Add Comment

Find the convex hull of a set of points in C#

Posted by Rod Stephens at 12/22/2009 8:19 AM | Add Comment

Sort and provide custom sorts for standard data types and objects in C#

Posted by Rod Stephens at 12/20/2009 7:45 AM | Add Comment

Format a number of bytes in KB, MB, GB, and so forth in C#

Posted by Rod Stephens at 12/13/2009 6:30 AM | Add Comment

Calculate logarithms in different bases in C#

Posted by Rod Stephens at 12/8/2009 8:42 PM | Add Comment

Convert between Excel-style column numbers and names in C#

Posted by Rod Stephens at 12/7/2009 5:32 AM | Add Comment

Calculate compound interest over time in C#

Posted by Rod Stephens at 11/30/2009 6:35 AM | Add Comment

Randomize the items in an array in C#

Posted by Rod Stephens at 11/27/2009 7:16 AM | Add Comment

Assign people (or anything else) to randomly selected groups in C#

Posted by Rod Stephens at 11/26/2009 7:37 AM | Add Comment

Make an extention method that converts a number into words (as in "one thousand eight hundred twelve") in C#

Posted by Rod Stephens at 11/25/2009 7:00 AM | Add Comment

Evaluate mathematical expressions with code in C#

Posted by Rod Stephens at 11/24/2009 6:28 AM | Add Comment

Draw a Barnsley fern fractal in C#

Posted by Rod Stephens at 11/16/2009 7:57 AM | Add Comment

Draw a Buddhabrot fractal in C#

Posted by Rod Stephens at 11/12/2009 7:08 AM | Add Comment

Draw a Hilbert curve fractal in C#

Posted by Rod Stephens at 11/11/2009 11:05 PM | Add Comment

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  1. Update ComboBox choices when the user enters a new choice in C#
    Friday, February 04, 2011
  2. Display a continuously updating graph of stock prices taken from the internet in C#
    Thursday, February 03, 2011
  3. Use a simple sprite class to animate several bouncing balls in C#
    Wednesday, February 02, 2011
  4. Animate several bouncing balls in C#
    Tuesday, February 01, 2011
  5. Compare two images to find differences in C#
    Monday, January 31, 2011
  6. Use a loop to load pictures into PictureBoxes in C#
    Sunday, January 30, 2011
  7. Make a kaleidoscope program in C#
    Saturday, January 29, 2011
  8. Pixelate areas on an image in C#
    Friday, January 28, 2011
  9. Make a map that shows a circular closeup of the part under the mouse in C#
    Thursday, January 27, 2011
  10. Use WMI to get lots of information about the operating system in C#
    Wednesday, January 26, 2011

Recent Comments

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  3. Rod Stephens on Use XML serialization to save and restore pictures drawn by the user in C#
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  5. Rod Stephens on Challenge: Write a program that can display its own code in C#
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  6. OperatorX on Challenge: Write a program that can display its own code in C#
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    11/28/2010
  10. Rod Stephens on Handle mouse events for a generic TreeNode class in C#
    11/24/2010
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